<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="(cart, index) in shopcartList"
          :key="cart.id"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked"
              @click="changeCheck(cart.isChecked, index)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>

          <li class="cart-list-con4">
            <span class="price">{{ cart.cartPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="reduceGoodAmount(index)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              @change="changeSkuNum(index, $event)"
              minnum="1"
              class="itxt"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="addGoodAmount(index, cart.skuNum)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.cartPrice * cart.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deleteCart(cart.skuId)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="checkAll&&shopcartList.length>0"
          @click="changeCheckAll"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteCheckedGoods">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ alreadyChoose }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ GoodsSum }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" target="_blank">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>
 
<script>
import { mapState } from "vuex";
import { throttle } from "@/utils/utils";

export default {
  data() {
    return {
      flag: true, //节流标志
    };
  },
  name: "ShopCart",
  mounted() {
    this.$store.dispatch("cart/getGoodsList");
  },
  computed: {
    ...mapState("cart", ["shopcartList"]),
    checkAll() {
      return this.shopcartList.every((item) => item.isChecked == "1");
    },

    alreadyChoose() {
      return this.shopcartList.reduce(
        (prev, cur) => prev + (cur.isChecked ? 1 : 0),
        0
      );
    },

    GoodsSum() {
      return this.shopcartList.reduce(
        (prev, cur) => prev + (cur.isChecked ? cur.cartPrice * cur.skuNum : 0),
        0
      );
    },
  },

  methods: {
    // 更改点选状态
    changeCheck(isChecked, index) {
      this.shopcartList[index].isChecked = !isChecked;
      this.$store.dispatch("cart/changeCheck", {
        skuID: this.shopcartList[index].skuId,
        isChecked: this.shopcartList[index].isChecked,
      });
    },
    // 全选
    async changeCheckAll() {
      let ajaxArr = [];
      if (this.checkAll) {
        //变成全不选
        this.shopcartList.forEach((item) => {
          item.isChecked = 0;
          ajaxArr.push(
            this.$store.dispatch("cart/changeCheck", {
              skuID:item.skuId,
              isChecked: item.isChecked,
            })
          );
        });
      } else {
        this.shopcartList.forEach((item) => {
          item.isChecked = 1;
          ajaxArr.push(
            this.$store.dispatch("cart/changeCheck", {
              skuID:item.skuId,
              isChecked: item.isChecked,
            })
          );
        });
      }

      //发请求
      await Promise.all(ajaxArr)
      
     
      
    },
    //加数量
    addGoodAmount: throttle(function (index) {
      this.shopcartList[index].skuNum++;
      //发请求
      this.$store.dispatch("cart/updataGoodNum", {
        skuId: this.shopcartList[index].skuId,
        skuNum: 1,
      });
    }),

    // 减数量
    reduceGoodAmount: throttle(function (index) {
      if (this.shopcartList[index].skuNum == 1)
        return (this.shopcartList[index].skuNum = 1);
      else this.shopcartList[index].skuNum--;
      //发请求
      this.$store.dispatch("cart/updataGoodNum", {
        skuId: this.shopcartList[index].skuId,
        skuNum: -1,
      });
    }),
    // 编辑数量
    changeSkuNum(index, e) {
      // 非法性判断、
      const originSkuNum = this.shopcartList[index].skuNum;
      let newSkuNum = e.target.value * 1;
      if (newSkuNum < 0 || isNaN(newSkuNum)) {
        e.target.value = originSkuNum;
      } else {
        newSkuNum = parseInt(newSkuNum);
        e.target.value = newSkuNum;
        this.shopcartList[index].skuNum = newSkuNum;
        //发请求

        this.$store.dispatch("cart/updataGoodNum", {
          skuId: this.shopcartList[index].skuId,
          skuNum: newSkuNum - originSkuNum,
        });
      }
    },
    //删除购物车商品
    async deleteCart(skuId) {
      try {
        if (confirm("确认删除吗？")) {
           await this.$store.dispatch("cart/deleteCart", skuId);
            this.$store.dispatch("cart/getGoodsList");
    
        }
      } catch (err) {
        alert(err.message);
      }
    },

    //删除选中的购物车商品
    async deleteCheckedGoods() {
      let arr = this.shopcartList.filter((item) => item.isChecked);
      let ajaxArr = [];
      arr.forEach((item) => {
        ajaxArr.push(this.$store.dispatch("cart/deleteCart", item.skuId));
      });
      let res = await Promise.all(ajaxArr);
      this.$store.dispatch("cart/getGoodsList");
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>